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Essay / Research Paper Abstract
A 6 page research paper that offers an overview of the cardiovascular system and its components, with a focus on the mechanisms of the heart and its functions. The writer focuses on describing how nature of cardiac muscle, how the heart functions and its interactions with the rest of the circulatory system. Bibliography lists 3 sources.
Page Count:
6 pages (~225 words per page)
File: D0_khcardio.rtf
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Unformatted sample text from the term paper:
contains roughly 5 liters of blood that is continuously circulating throughout the cardiovascular system (The Circle of Blood). This circulatory system consists of three distinct, but interdependent systems, which include
pulmonary circulation (the lungs), coronary circulation (the heart), and systemic circulation (the rest of the circulatory system, arteries, veins, capillaries, etc.) (The Circle of Blood). Humans, as well as other
mammals and birds, have a four-chambered heart with two atria and two ventricles (Phillips). In human gestation, the heart begins the process of assuming its adult form by the eighth
week (Miller-Hoover 105). The fetal heart begins as a tubular organ and folds in upon itself to form four rudimentary chambers, an inflow tract and an outflow tract (Miller-Hoover 105).
Due to this design, oxygenated blood and deoxygenated blood (blood in which the oxygen has already been utilized by the body) are not mixed. The four chambers of the heart
ensure that efficient and rapid movement of oxygenated blood reaches all organs of the body (Phillips). As this suggests, the human heart is a muscular pump, composed almost entirely of
pure muscle (Phillips). All muscles function through the mechanism of contraction, which causes muscle cells to shorten. Skeletal muscles, which make up the vast majority of the mass in
a healthy body, are voluntary muscles and contract when the brain sends a signal telling them to react, making movement possible. The smooth muscle tissue make up the involuntary muscles,
which means that they do not have to be told by the brain to contract. Cardiac muscle is involuntary. In this manner, the cardiac muscle is similar to smooth
muscle tissue; however, anatomically, the cardiac muscle more closely resembles skeletal muscle as both heart tissue and skeletal muscle are striated (Phillips). This means that under magnification in a microscope,
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